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  3. 9th Class
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9th Class Science Sample Paper Science Olympiad Model Test Paper-9

  • question_answer
    30 mL of ethanol is present in 180 mL of its aqueous solution. What is the concentration of the solution?

    A) 16.67%

    B) 17.67%

    C) 18.67%

    D) 19.67%

    E) None of these

    Correct Answer: A

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